ebay madness. Cannot leave bad FB

Ebay...another one of the many things in life that "used to be good but sucks now".
This was the second of a 1-2 punch for me this month. I agree with you about how sellers should leave FB when item is paid-for but that's only in the legendary perfect world. The first punch was I sold a tool to some Ford idiot and the item was listed only by part number. Nothing else. I DID leave him +FB as soon as he paid since "what can go wrong?". He gets it, then pisses and moans that the tool does not fit his engine, states that I should have listed all of the applications that the tool fits, then gives me my 1st negative FB ever after hundreds of deals. I even offered to give the moron a refund. I also recently sold a dozen or so items, all perfectly described and shipped immediately as-always and the only FB buyers bothered to leave was the negative I just mentioned and 1 positive out of 12 sales.
It's just no fun anymore